如何在 sympy gamma 中计算 x^2

Question

I am very new to coding in Python and using the django.

My question: is it possible to calculate x^2 in sympy gamma?In my program x**2 is working but x^2 is not working.

^ is not working.

my code is-

from django.shortcuts import render, redirect
from django.http import HttpResponse
from sympy import *
from sympy.parsing.sympy_parser import *
import sympy as sp

# Create your views here.

def index(request):

    if request.method == "POST":

        x = symbols('x')
        init_printing()
        transformations = (standard_transformations + (implicit_multiplication_application,))
        eq = parse_expr(request.POST['equ'], transformations=transformations)       
        sympifyy = latex(sympify(eq, evaluate=False))
        sympifyy1 = Eq(eq)
        derivative = latex(sp._eval_derivative(eq,x))
        integration = latex(sp.integrate(eq, x))
        # integration = integrate(eq, x)
        # pretty(latex(Integral(eq, x)),use_unicode=False)
        # print(pretty(Integral(sqrt(1/x), x), use_unicode=False))
        rootss = solve(eq)
        limits = limit(eq, x, 0)        
        seriess = latex(series(eq, x, 0, 10))

        data = {
            'Sympify' : sympifyy,
            'Sympify1' : sympifyy1,
            'Derivative' : derivative,
            'Integration' : integration,
            'Roots' : rootss, 
            'Limit' : limits,
            'Series' : seriess
            }

        return render(request, 'index.html', {'data':data})

    return render(request, 'index.html')

Ex-when user gives input is working **(x 2+x+2)** but user give input (x^2+x+2) then error occurs

Answer 1

The answer seems quite simple. Just .replace("^", "**") your incoming equation.

eqn = request.POST['equ'].replace("^", "**")
eq = parse_expr(eqn, transformations=transformations)

Additionally, I think there's a mistake in your code, should it be:

derivative = latex(sp.diff(eq,x))

Answer 2

As described in SymPy's online documentation SymPy follows the Python standard, where ^ is used for exclusive or (Xor).

So, your statement that ^ is not working, is inaccurate. It only does something else as what you imagined it would do. Xor is a quite nasty function, as it is only defined for booleans, not for unlimited integers nor for non-integer types of numbers.

Therefore, in your call to parse_expr you might want to add convert_xor to the list of transformations, as in

transformations = standard_transformations + (implicit_multiplication_application,) + (convert_xor,)

This function explicitly transforms ^ to ** .